Keyword	Found In	Repeats	Density	Prom.
seoquake	TH1D	47	4.1%	9.2
seo	TH1	38	3.3%	8.7
page		24	2.1%	5.4
extension	T	19	1.7%	7.1
keywords		16	1.4%	4.8

Site Audit

Full Semrush-powered site audit for backlinko.com

Page Analysis Mobile Compliance Technical Compliance

Overall

84

17 2 5

Page

77

5 1 2

Mobile

100

2 0 0

Technical

82

11 1 4

Page Analysis

Title Tag 55 chars

SEOquake: Free SEO Chrome Extension for On-Page Analysis

55 characters (optimal: 50-60)

Your title tag is well-optimized at 55 characters. It includes a primary keyword and fits within Google's display limits.

Meta Description 148 chars

SEOquake is a free Chrome extension by Semrush that gives you instant SEO metrics, on-page audits, and keyword density analysis for any webpage.

Present and readable, but likely to truncate beyond Semrush's recommended range.

Semrush guidance is closer to 135 characters. Tighten the copy so the core value proposition lands before truncation.

Missing ALT Attributes 12 missing

12 of 23 images are missing descriptive alt text.

This weakens accessibility and image-context signals at the same time.

Fix the missing alt text on this page, then use Site Audit to catch the same pattern across the rest of the site.
Fix across your site → Site Audit (Free)

Text/HTML Ratio 14.2%

This page has a relatively heavy HTML shell compared with its visible copy.

Treat this as an informational signal rather than a hard quality score.

Use ratio alongside intent, headings, and total copy depth instead of chasing a single “ideal” percentage.

Heading Structure Proper

Single H1, proper hierarchy

Heading structure follows best practices.

URL clean

https://backlinko.com/hub/seo/seoquake

Readable, descriptive, and free of noisy query parameters.

The slug is easy to parse for users and aligns well with the topic of the page.

Keyword Density 4.1%

Top repeated phrase: “seoquake” at 4.1% of visible page copy.

Informational only. Density helps compare emphasis, not decide quality on its own.

Use the density data with heading structure and SERP intent before making copy changes.

Internal Links 16 links

Internal link volume is healthy and points users toward adjacent SEO topics.

Informational only. Quantity matters less than contextual fit and destination quality.

Open the Links report to inspect anchor text, follow state, and broken targets before making changes.

Mobile Compliance

Viewport Meta Tag Set

Properly configured

Viewport is set correctly for mobile rendering.

Responsive Design Detected

Media queries detected

Page uses responsive breakpoints.

Technical Compliance

HTTP Status 200

The page returns a successful 200 response and is reachable without redirect chains.

This page is accessible to crawlers and users from the primary URL.

XML Sitemap found

https://backlinko.com/sitemap.xml

The sitemap is reachable and can help search engines discover the rest of the site faster.

Robots.txt allowed

https://backlinko.com/robots.txt

Robots.txt is present and does not block this page from crawling.

Meta Robots index, follow

No restrictive crawl directives appear in the page-level meta robots tag.

The page is open to indexing and normal link discovery from its HTML metadata.

X-Robots-Tag not set

No page-level X-Robots-Tag header is returned in the HTTP response.

This is informational. The page is governed by its HTML directives unless the server later adds X-Robots-Tag rules.

HTTPS secure

The page is served over HTTPS with a valid certificate chain.

Transport security is in place and the canonical URL already resolves to HTTPS.

Mixed Content none

No insecure subresources are loading over HTTP on this page.

All critical page assets appear to be delivered over HTTPS.

HSTS missing

Strict-Transport-Security is not advertised on the initial response.

Add HSTS at the server or edge layer to harden HTTPS and reduce downgrade risk.

Page Size 2.3 MB

The rendered page weight is serviceable but heavy for a content-driven experience.

Audit large hero media, third-party scripts, and duplicate CSS to lower transfer cost.

Canonical variant

https://backlinko.com/hub/seo/seoquake/

A canonical exists, but the trailing-slash variant differs from the analyzed page URL. Keep canonical and internal linking format consistent.

Language Declaration en

The HTML document exposes a valid lang declaration.

Language metadata is available for crawlers, browsers, and assistive technologies.

Favicon found

A favicon is available and resolves successfully.

This is a small signal, but it improves polish in browsers, tabs, and shared previews.

Schema.org Markup 3 types

Article, BreadcrumbList, and Organization structured data are all present.

The page already exposes enough schema to support stronger entity understanding and richer search features.

Hreflang 0 tags

No hreflang cluster is present on this page.

That is acceptable for a single-market page. Add hreflang only when you need language or regional alternates.

Google Analytics GA4

Analytics instrumentation is present and the property type resolves to GA4.

Tracking is installed and can support downstream page-level analysis.

Noindex Tag indexable

No noindex directive is present in HTML or HTTP metadata.

This page is eligible for indexing based on the directives visible here.

EncodingUTF-8

DoctypeHTML5

HTML Size186 KB

HTTP Headerscache-control, content-type, server, x-frame-options

Hreflang Tags0 tags

Image Analysis

Total Images47

With alt text35 74%

Missing alt12 Missing

Oversized (>500KB)3 Optimize

Format Distribution

WebP22 (47%)

JPEG14 (30%)

PNG8 (17%)

SVG2 (4%)

GIF1 (2%)

Missing Alt Text 12 images

Filename	Dimensions	Status
hero-banner.jpg	2400×1200	Missing alt
screenshot-audit.png	800×600	Missing alt
icon-seo.svg	24×24	Missing alt
team-photo.png	1800×900	Missing alt
infographic.png	3000×2000	Missing alt

Oversized Images 3 images

Image	Dimensions	Size	Status
hero-banner.jpg	2400×1200	1.2 MB	Too large
team-photo.png	1800×900	890 KB	Consider optimizing
infographic.png	3000×2000	2.1 MB	Too large

Structured Data & Social Tags

Article BreadcrumbList Organization

Schema Summary Valid

FormatJSON-LD

Types Found3 (Article, BreadcrumbList, Organization)

AuthorBrian Dean

Published2024-01-15

Modified2024-03-22

Each detected schema type should render as its own reusable detail block. The exact types change page by page.

Detected Schema Type

Article

JSON-LD · 9 top-level properties · Primary entity

{
  "@context": "https://schema.org",
  "@type": "Article",
  "headline": "SEOquake: Free SEO Chrome Extension for Instant Metrics",
  "author": {
    "@type": "Person",
    "name": "Brian Dean"
  },
  "datePublished": "2024-01-15",
  "dateModified": "2024-03-22",
  "publisher": {
    "@type": "Organization",
    "name": "Backlinko"
  },
  "image": "https://backlinko.com/wp-content/uploads/seoquake-hero.jpg",
  "mainEntityOfPage": "https://backlinko.com/hub/seo/seoquake"
}

Detected Schema Type

BreadcrumbList

JSON-LD · 3 list items · Navigational context

{
  "@context": "https://schema.org",
  "@type": "BreadcrumbList",
  "itemListElement": [
    {
      "@type": "ListItem",
      "position": 1,
      "name": "Home",
      "item": "https://backlinko.com"
    },
    {
      "@type": "ListItem",
      "position": 2,
      "name": "SEO Hub",
      "item": "https://backlinko.com/hub/seo"
    },
    {
      "@type": "ListItem",
      "position": 3,
      "name": "SEOquake",
      "item": "https://backlinko.com/hub/seo/seoquake"
    }
  ]
}

Detected Schema Type

Organization

JSON-LD · Brand entity · Publisher context

{
  "@context": "https://schema.org",
  "@type": "Organization",
  "name": "Backlinko",
  "url": "https://backlinko.com",
  "logo": "https://backlinko.com/favicon-32x32.png",
  "sameAs": [
    "https://www.linkedin.com/company/backlinko",
    "https://twitter.com/backlinko"
  ]
}

Test in Rich Results →

Open Graph Tags

og:titleSEOquake: Free SEO Chrome Extension...

og:descriptionSEOquake is a free Chrome extension...

og:typearticle

og:image(present) Set

og:urlhttps://backlinko.com/hub/seo/seoquake

Twitter Card

twitter:cardsummary_large_image

twitter:site@backlinko

twitter:titleSEOquake: The Complete Guide

twitter:image(present) Set

Social Share Preview

Run Semrush Site Audit - Free for 100 Pages

Keyword Density Report

Phrase analysis and content emphasis data for backlinko.com/hub/seo/seoquake

2,487Total words

471-word phrases

312-word phrases

183-word phrases

114-word phrases

1-Word Phrases 47 unique

Keyword	Found In	Repeats	Density	Prom.
seoquake	TH1D	47	4.1%	98
seo	TH1	38	3.3%	95
page		24	2.1%	61
extension	T	19	1.7%	72
keywords		16	1.4%	45
analysis	T	14	1.2%	68
audit		12	1.0%	38
free	TD	11	0.9%	55
semrush	D	10	0.9%	42
links		9	0.8%	30
backlinks		8	0.7%	25
content		7	0.6%	20

2-Word Phrases 31 unique

Keyword	Found In	Repeats	Density	Prom.
seo audit	H1	12	1.0%	88
chrome extension	T	9	0.8%	82
keyword density		8	0.7%	35
on page	T	7	0.6%	70
link analysis	D	6	0.5%	52
search engine		5	0.4%	28
seo tools		5	0.4%	25

3-Word Phrases 18 unique

Keyword	Repeats	Density	Prom.
seo chrome extension	6	0.5%	75
on page seo	5	0.4%	65
keyword density analysis	4	0.3%	30
free seo tool	3	0.3%	48

4-Word Phrases 11 unique

Keyword	Repeats	Density	Prom.
free seo chrome extension	3	0.2%	81
instant seo metrics extension	2	0.1%	73
keyword density analysis tool	2	0.1%	44
semrush seo browser extension	1	0.1%	52

Bookmarks

1-word keywords table 2-word keywords table 3-word keywords table 4-word keywords table Original text

Page Info

Title: Free SEO Checker: Audit Any Page in Seconds + Actionable Fixes

Meta description: Get instant SEO scores and uncover hidden on-page SEO opportunities. Analyze your webpage for free and outrank competitors today.

Filter

Starts with Contains Regexp

Keywords Cloud

seo site pages google content step search audit page links tool rank data keyword semrush understand backlinks crawler

Original Text

Based on visible page copy only. Keywords in the table can link out to Semrush for deeper keyword analysis, while the original text view helps validate whether repeated phrases are naturally distributed through the page.

Links Report

All links found on backlinko.com/hub/seo/seoquake

43Total

38Unique

16Internal

27External

34Dofollow

9Nofollow

2Broken

Internal Links 16 links

No-follow

2

Internal links marked nofollow

Semrush Backlinks

3.35M

Backlink count for the current URL

#	URL	Anchor Text	Type	Follow	Status
1	https://backlinko.com/	Backlinko	INT	DF	200
2	https://backlinko.com/hub	SEO Hub	INT	DF	200
3	https://backlinko.com/hub/seo	SEO	INT	DF	200
4	https://backlinko.com/hub/seo/seo-tools	SEO Tools	INT	DF	200
5	https://backlinko.com/hub/seo/on-page-seo	On-Page SEO	INT	DF	200
6	https://backlinko.com/hub/seo/technical-seo	Technical SEO	INT	DF	200
7	https://backlinko.com/hub/seo/keyword-research	Keyword Research	INT	DF	200
8	https://backlinko.com/hub/seo/link-building	Link Building	INT	DF	200
9	https://backlinko.com/seo-audit	SEO Audit Checklist	INT	DF	200
10	https://backlinko.com/keyword-research	Keyword Research Guide	INT	DF	200
11	https://backlinko.com/seo-tools	Best SEO Tools	INT	DF	200
12	https://backlinko.com/blog	Blog	INT	DF	200
13	https://backlinko.com/about	About	INT	DF	301
14	https://backlinko.com/contact	Contact	INT	DF	200
15	https://backlinko.com/newsletter	Newsletter	INT	DF	200
16	https://backlinko.com/old-guide	Old Guide	INT	DF	404

External Links 27 links

No-follow

7

External links marked nofollow

Whois

Live

Whois lookup for linked domains

Semrush Rank

14.0K

Domain rank context for outbound targets

Semrush Backlinks

3.35M

Backlink count for the linked target

Semrush Subdomain Backlinks

4.52M

Subdomain backlink context

#	URL	Anchor Text	Type	Follow	Status
1	https://www.semrush.com/analytics/keywordoverview/?q=&db=us	Semrush	EXT	DF	200
2	https://chrome.google.com/webstore/detail/seoquake	Chrome Web Store	EXT	NF	200
3	https://www.semrush.com/siteaudit/	Semrush Site Audit	EXT	DF	200
4	https://www.semrush.com/analytics/backlinks/	Backlink Analytics	EXT	DF	200
5	https://www.semrush.com/signup/	Create a Semrush account	EXT	DF	301
6	https://twitter.com/backlinko	Twitter	EXT	NF	301
7	https://www.facebook.com/backlinko	Facebook	EXT	NF	200
8	https://www.linkedin.com/company/backlinko	LinkedIn	EXT	NF	200
9	https://www.youtube.com/channel/backlinko	YouTube	EXT	NF	200
10	https://marketingplatform.google.com/about/analytics/	Google Analytics	EXT	DF	200
11	https://www.screamingfrog.co.uk/seo-spider/	Screaming Frog	EXT	NF	200
12	https://pagespeed.web.dev/	PageSpeed Insights	EXT	DF	200
13	https://developers.google.com/search	Google Search Central	EXT	DF	200
14	https://web.dev/blog/	web.dev	EXT	DF	200
15	https://www.semrush.com/position-tracking/	Rank Tracker	EXT	DF	200
16	https://www.semrush.com/on-page-seo-checker/	On Page SEO Checker	EXT	DF	200
17	https://www.semrush.com/content-marketing/	SEO Content Template	EXT	DF	200
18	https://validator.schema.org/	Schema Validator	EXT	DF	200
19	https://detailed.com/extension/	Detailed SEO Extension	EXT	NF	200
20	https://www.semrush.com/ai-seo/	Semrush AI Visibility	EXT	DF	200
21	https://moz.com/tools	Moz	EXT	NF	200
22	https://ahrefs.com	Ahrefs	EXT	NF	200
23	https://www.statista.com/statistics/website-traffic	Statista	EXT	DF	200
24	https://www.semrush.com/company/legal/terms-of-service/	Terms of Service	EXT	DF	200
25	https://www.semrush.com/company/legal/privacy-policy/	Privacy Policy	EXT	DF	200
26	https://www.semrush.com/backlink_audit/	Backlink Audit	EXT	DF	200
27	https://old-seo-blog.com/tips	SEO Tips	EXT	DF	404

URL / Domain Comparison

Compare any two URLs or domains side by side

Target A

Target B

Metric	backlinko.com	ahrefs.com
Semrush Rank	13,988	21,341
Semrush SE Traffic	164,539	1,245,210
Semrush SE Traffic Price	$570,283	$1,920,440
Semrush Backlinks	3,346,409	62,104,981
Semrush Subdomain Backlinks	4,522,921	89,404,332
Semrush Root Domain Backlinks	4,542,400	90,118,507

Page Info

Page context, free Semrush snapshot data, and connected domain intelligence for backlinko.com/hub/seo/seoquake

Semrush Overview

Semrush Rank

14.0K

Semrush SE Traffic

165K

Traffic Cost

570K

Semrush Backlinks

3.35M

Semrush Subdomain Backlinks

4.52M

Semrush Root Domain Backlinks

4.54M

Basic Page Info

Title Tag ?

55 chars

SEOquake: Free SEO Chrome Extension for Instant Metrics

Meta Description ?

148 chars

SEOquake is a free Chrome extension by Semrush that gives you instant SEO metrics, on-page audits, and keyword density analysis for any web page.

Page Summary

87Links

46Internal Links

41External Links

23Images

1H1

8H2

12H3

2,487Words

Technical Snapshot

URL ?

Clean

backlinko.com/hub/seo/seoquake

Robots.txt ?

Index, Follow

index, follow

Schema ?

3 types

Article, BreadcrumbList, Organization

Canonical ?

Self-ref

Self-referencing canonical

Keyword Density Preview Open full report →

1-Word Phrases

47

Top keyword: seoquake

2-Word Phrases

31

Top phrase: seo audit

3-Word Phrases

18

Top phrase: seo chrome extension

4-Word Phrases

11

Top phrase: free seo chrome extension

Connected Semrush Analysis

Total Backlinks

8,491

Referring Domains

1,247

Referring IPs

987

Monthly Visits

892K

Backlinks Overview

Total Backlinks 8,491

Referring Domains 1,247

Referring IPs987

TLD Distribution

.com

774

.org

187

.net

100

.co.uk

62

.io

50

Other

74

Country Breakdown

United States38% · 2,083

United Kingdom12% · 658

India9% · 492

Germany7% · 384

Other34% · 1,868

View complete backlink report in Semrush →

Traffic Analytics

Monthly Visits892K

Unique Visitors654K

Bounce Rate 42.3%

Pages per Visit3.4

Avg. Visit Duration4m 12s

Traffic Sources

Direct

35%

Search

42%

Referral

14%

Social

6%

Paid

3%

View complete traffic report in Semrush →

Content View Content Audit →

Technical Snapshot View Audit →

Semrush Overview

Heading Structure Copy Headings

Keyword Density Top 5

Images 47 found

Social Share Preview

Site Audit

Page Analysis ?

Mobile Compliance

Technical Compliance

Image Analysis

Format Distribution

Missing Alt Text 12 images

Oversized Images 3 images

Structured Data & Social Tags

Social Share Preview

Keyword Density Report ?

1-Word Phrases 47 unique Copy Keywords

2-Word Phrases 31 unique

3-Word Phrases 18 unique

4-Word Phrases 11 unique

Links Report

Internal Links 16 links

External Links 27 links

URL / Domain Comparison

Page Info

Semrush Overview

Basic Page Info

Page Summary

Technical Snapshot

Keyword Density Preview Open full report →

Connected Semrush Analysis

Backlinks Overview ?

TLD Distribution ?

Country Breakdown

Traffic Analytics

Traffic Sources ?

Heading Structure

Page Analysis

Keyword Density Report

1-Word Phrases 47 unique

Backlinks Overview

TLD Distribution

Traffic Sources